So, you may have noticed that 5 GHz Wi-Fi has smaller coverage area than 2.4 GHz.
It works that way all the way down to infrasound, which is <20 Hz, and natural examples would be whale communications (thousands of kilometers) or volcano eruptions (infrasound wave from Krakatoa eruption lapped around entire globe multiple times).
As for human factors - basically any big industrial tech object is gonna be the source of ultrasound. So it’s kind of safe to assume that infrasound from data centers may be “heard” from at least several kilometers away. Dunno how it compares to refineries and power substations - but they’re also source of that.









Yep, people involved are the biggest problem sometimes.
I’ve had to figure how to fix many issues myself, because quite often upon finding a thread where someone already had an issue that I had, folks were tryna gaslight the OP why it’s not actually an issue, eventually turning the thread into shit flinging contest. Or the good old “don’t do that, you’ll break something” (that I proceeded to do and was absolutely okay).
Not to mention how FOSS developers have to deal with entitled assholes every now and then.